//Program: Pico_LLP_02b.ino ///////////

//pointers for GPIO Registers
//uint32_t *gpioOUT     = (uint32_t *)(0xD0000010);
uint32_t *gpioOUT_SET = (uint32_t *)(0xD0000014);
uint32_t *gpioOUT_CLR = (uint32_t *)(0xD0000018);
//uint32_t *gpioOUT_XOR = (uint32_t *)(0xD000001C);

//Set Table for LEDs
uint32_t ledTable[4] = {  0b0001,
                          0b0010,
                          0b0100,
                          0b1000};

void setup() {
  Serial1.begin(1152000);
  Serial1.println("Start Pi Pico....");
  for(int i = 0; i < 4; i++){
      pinMode(i, OUTPUT);
  }
}

void loop() {
    for(int a = 3;a >= 0; a--){
      *gpioOUT_SET = ledTable[a]; //LED ON
      delay(1000);
      *gpioOUT_CLR = ledTable[a]; //LED OFF
  }
} // END Program here //////////